# coding:utf-8

def run(obj):
    """

    :param obj: 要求obj对象具有get方法
    :return:
    """
    print("start")
    obj.get()
    print("end")

# class Base(object):
#     def get(self):
#         pass
#
#
# class A(Base):
#     def get(self):
#         pass
#
# a = A()
#
# def run(Base obj)
#
# run(a)